Improvement in ratchet-drills



3 Sheets-She etl. J. RENSHAW'.

, I RATCHET mum... No.176, 683. Patented April 25,1876.

V, @JZQ N PETERS, FHOTO-LITHOGRAPHER, WASHINGYON D C 3 SheetS-SheetZ. J. REN SHAW. RATCHET DRILL.

No .176,6 83. Patented. Aprf'1125,;1876.

It I g i i I I ai fl ifga flpwzagqgp To allwhmii, it Macy concern: Be it known thatlI, JosEPH Hartford, in the county of Hartford and State UNITED-STATES- PATENT Or rice T i JOSEPH RENSHAW, OF HARTFORD, CONNECTICUT.

' IMPROVEMENT lN RATCHET-DRILLS.

. v Specification forming part of Letters Patent No. 176.683. dated April 25, 1876 applicationfiied I i 1 Septemberhl, 1875.

' YREN-SHIAW, of

of Connecticut, have invented certain new anduseful Improvements in Ratchet Drilling- Tools; and I do hereby declare that the following is a full, clear, and exact description thereof, whereby a person skilled in the art can make and use the same, reference being had-to theaccompanying drawings, and to the letters of reference marked thereon.

- Like letters in the figures indicate the same parts. a

j My invention relates totools such as are usually used indrilling metal by hand insuch Y the drill is removed.

positions as are not readily accessible to auto- 1 against some resisting support.

The object of my invention is to provide a drilling-tool which shall occupy less-space between the Outer point of the feed-screw and the work to be drilled, so asto operate in more contracted andle'ss. accessible positions,

and which shall be adapted to hold securely and work readily with drills of different forms and patterns in the part fitting into the drillin g mechanism. It also has for its object pro viding a means for removing the drill from the stock readilyand easily.

My invention-consists in the construction pand arrangement of the several parts of the mechanism'of the ratchetdrilling -tool, that will be hereinafter described.

In the. accompanyingdrawings, on three sheets, Figure l .is a side view of my improved drilling-tool, showing its exterior form and appearance with a drill inserted. Fig. 2 is a vertical longitudinal section through, the middle of the tool, showing. the interior parts of I the drill-socket in the positiontheyhave when Fig. 3'is a longitudinal horizontal section through the handle and ratchet mechanism. Fig. lshows details of the drillsocket and'interchangeable parts, that will be hereinafter described. Fig. 5

shows a vertical and horizontal section of the ring or band to which the handle is attached,

tached. t.

a. is a hollow spindle, forming the main body of the tool, to which the other-parts are at-- tach'ed.- Around this spindle is the ratchetwheel 0, formed upon an enlarged 'partor ring, b, nearits middle.

the drill by nieans ot' a lever inserted in the holesm. f is a hollow tool-socket, screwed into the lower end of. a, and fitting the interior chamber of the hollow feed-screw d. Itis screwed "into its place or removed by means of the polygonal head g." 'h is a sliding pin,

fitting in the upper part ofthe socketf, which is intended to hold the'tang of .the drill. This pin has a narrow flange upon its upper end to prevent its falling out when'th'e drill is removed. Y M

When the drill'is inserted in the socket, the

pinis pushed inward in the position shown at g h in Fig. gt,'so that its end projects beyond the socket f. When'it is desired to remove the drill,fthe feed-screw d is turned in until it strikes the pin it, and expels the tang of the drill from the socket. The pin h, instead of being a separate piece in the socket f, maybe part of the tang of the drill, and be inserted and removed with it. In this case the tang would be of such a length that the pin would project a sufficient-distance beyond the end-of the socket to be acted upon by the head of V the feed-screw, as shown at i, Fig. 4.

j is a ring or.collar upon thespindle a, forming the top of "the groove in which the band m turns. This ring is shown in the drawings as screwed onto the spindle a; but it maybe made in one piece with it, as it does not require to'be removed.

j is a similar ring or collar, between which and j the band m is held in place. This ring is attached to a by means of a screw-thread, asit requires to be attached after the band m d is a hollow feed-screw, having an external thread, which works in a' nut or internal screw-thread in the upper part The head 0 of this feed-screw is provid-' ed with a point or center, e,which presses against a support when the tool is in use, and upon which the screw is turned to advance is in place. The collars j j are provided withfits the holess'u, andwhen notin-use'iseretained smaller. tang.-

f, Fig. 4. The collet f is placed upon thee.

the polygonal heads n n, for applying a wrench to'turir them.. mis aband surround ing the spindle a, and having on one side the socket 0, into which is screwed the handle 19. In the'end of the handle which enters this socket is the pawl q, whiehis'actuatediby the:

springs, and passes through the opening r, so as to engage with the ratchet-wheel c. This pawl is of the bolt form, and; slidesin the" opening 1", and in the recess 1) of the handle.

u is a pin for operating the feed-screw d. It

smaller tang, which: makesdt operate in: the; same manner as the larger, andhittis forced out of the socket j by means of the pin '6" and... the feedscrew d in the same way. Theinner't socket or colletis provided.- with ..a.-.:slot,,t', to insert a-wedge;or othertool, tbr thepurpose of withdrawing the tang of the drilr 'lyingwithinzit.

herein describedm'ay be-round'or sq-uar.e,landr .of any desired taper; Theycan be held from" turning either by friction, or by making some The drilltangs fitting into.themsocketst I part angular, The socket in f is supposed to besquare, but might be-of any other form. The socket'inj is supposed to be round and taper, with the part i of a tenon form, to hold in an angular mortise in the end of f. This, however, is not usually required.

spindle a, so as to hold by friction instead of being screwed in, as described.

What, I'claim as my invention isthreaded feed-screw d and the hollow internally-threaded ratchet-s 'iindle a with a drilling tool', substantially as described.

2. The combination of the hollow externallythreaded feed-screw d, the hollow internallythreaded ratchet-spindle:mend an interior tool holding"socket, substantially as herein described... v

3.1-Thecombinationfof the hollowexternallythreaded feed-screw d, the hollow internallyth nead-ed ratchetrspindle a, the collet f, pin; h,-

and: drilling-tool, substantially asdescribed. V 4.. The combination-of the hollow externallythreadedfeed-screw; (1-,, the hollow. internally- "thneaded ratchet-spindle a,.a tool-holding colelet or socket,.and adrillin g-tool, substantially as described;v

and the interior. open-ended; drill-socket, .to

expel the-drill, substantially in. the manner herein described. '6.-The combination of: the hollow internallythreadedratchet-spindle a, the band: m, with its soeketo, thevcollars j j, .the leverap and thepawl" q, substan tially as; described;

JOSEP-H- RENSHAW. {[L. a Witnesses:

S. I. WILDER,

JEREMY W. Bmss.

The sockets f f may also be set into the 1. The combination of the hollow externally- I 5. The combination of the hollow feed-screw 

